How to append or add multiple items to an array in Swift 4

Question

Here is what I want to archive:

I have a couple of names, let's say it 100 names. These names are listed in a text file or an excel file. I would like to add those names to an array, when I tap a button.

var namesPool: [String] = []

But I have no ideas how to get it work. Any suggestions would be appreciated.

Answer 1

The first step is to read the text from your file. There is a good example on how to do this here: Read and write data from text file

The second step is to convert the output String to an array. Since every name is on one line, you can separate each value by the \n newline character.

let names = fileNames.components(separatedBy: "\n")

Answer 2

First : add the text file into the project.

Second: make sure it's present in Build Phases -> Copy Bundle Resources.

 func getNames(fileName: String) -> [String]?
 {
     guard let path = Bundle.main.path(forResource: fileName, ofType: "txt") else
     {
         return nil
     }

     do
     {
         let content = try String(contentsOfFile:path, encoding: String.Encoding.utf8)
            return content.components(separatedBy: "\n")
     }
     catch _ as NSError
     {
         return nil
     }
 }

Usage:

let namesPool = getNames(fileName:"names")